Originally Posted by
Shockley
And judging by what I read on that Sheldon Brown guy's web page, it's not unlikely that the hub has plain crapped out on me. So I really don't know what to do about that. I guess I'm gonna have to look for a new trike hub. Bummer.
Shockley-
There are many ways the shifter system can get loused up that are simple to repair and that do not involve the internals of the hub being hosed.
I'm a volunteer bike mechanic at a community garage, and I've seen a lot of ancient shimano three-speed hubs that work just fine.
Replacement shifters, cables, and shifting linkages (down by the hub) are reasonably priced and readily available on them intarwebs.
Just an example:
http://johnsvintagebikes.com/jvb_cat...s_catalog.html (see shimano three-sped vintage replacement parts heading).
Replacements parts are still manufactured, so your local bikeshop could probably get them cheaper.
You'll be a happy camper if you can get that thing going! Do give it a shot.